Flow properties of injection moldable aromatic polyesters

Details Flow properties of injection moldable aromatic polyesters Flow properties of injection moldable aromatic polyesters

C - Chemistry, Metallurgy

08

L

400/5712

C08L 67/02 (2006.01) C08G 63/60 (2006.01) C08L 67/00 (2006.01) C08L 67/04 (2006.01)

Patent

CA 1268881

IMPROVEMENT OF FLOW PROPERTIES OF INJECTION MOLDABLE AROMATIC POLYESTERS ABSTRACT The molding properties of molding compounds based on wholly aromatic polyesters are improved by the addition to such wholly aromatic polyester compositions of a minor amount of an aromatic polyester which is a combination of the following units: Image Where; p = 0 to 0.9, q = 0.1 to 1.00, r = 1 to 7, S = 0.03 to 1.00, t = 0 to 0.7. A preferred formulation consists of a polyester where the units are: p = 0, q = 1.0, r = 1 to 5 and S = 1Ø BACKGROUND ON THE INVENTION It is known that wholly aromatic esters are suitable for use in molding compositions. The synthesis of wholly aromatic polyesters of the type with which the pre- sent invention is principally concerned is disclosed in U.S. Patent No. 3637595, entitled, "p-Oxybenzoyl Copolyester". Other patents disclosing the molding properties of aromatic polyesters, more particularly of oxybenzoyl polyesters are U.S. Patents 3,662,052, 3,849,362 and 4,219,629. Another group of aromatic polyesters which can be employed are the aromatic polyesters containing recurring - 1 -

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